Everything About Portals (explained with real physics)

What would a real portal do? From teleportation and wormholes to gravity that bends through the opening, an edge that pulls, and pocket dimensions, this is the physics of portals, worked out in a lab I built to simulate them. CHAPTERS 0:00 The cube puzzle: A or B? 2:03 Could portals be real? 5:31 Portal, the game 8:05 Gravity through a portal 13:27 Portals in strange shapes 19:04 The answer to the cube Gravity results are a computed model (Newtonian, 2D slice). Inspired by Optozorax's portal videos. Portraits: public domain (Wikimedia Commons). SOURCES Einstein, A. & Rosen, N. (1935). The Particle Problem in the General Theory of Relativity. Physical Review 48, 73–77. https://doi.org/10.1103/PhysRev.48.73 Morris, M. S. & Thorne, K. S. (1988). Wormholes in spacetime and their use for interstellar travel. American Journal of Physics 56, 395–412. https://doi.org/10.1119/1.15620 Visser, M. (1995). Lorentzian Wormholes: From Einstein to Hawking. AIP Press. Ren, J.-G. et al. (2017). Ground-to-satellite quantum teleportation. Nature 549, 70–73. https://doi.org/10.1038/nature23675 Nelms, Roberts, Thomas & Starkey (2013). Travelling by Teleportation. Journal of Physics Special Topics, University of Leicester.